Twelve-year-old Dion loves his summers in Birch Bay, a quirky seaside village where he spends all of his time with his best friend Leo. The boys play video games together, hang out at the swimming hole in the woods and explore on their bikes. This year is different, though. Dion learns it will be Leo?s last summer in Birch Bay. Then their freedom is threatened by the Immortals, the swim team who torments all the other kids at the local middle school. When the Immortals commandeer the treehouse at the swimming hole, Leo and Dion decide to take a stand.